Mass. Gen. Laws ch. 176G § 16
The subscriber contracts, rates and evidence of coverage shall be subject to the disapproval of the commissioner. No such contracts shall be approved if the benefits provided therein are unreasonable in relation to the rate charged, nor if the rates are excessive, inadequate or unfairly discriminatory. Classifications shall be fair and reasonable.
To the extent that this chapter is inconsistent with the provisions of chapter one hundred and seventy-six K, and any regulations promulgated thereunder, medicare supplement insurance plans as defined in said chapter one hundred and seventy-six K shall be subject to the provisions of said chapter one hundred and seventy-six K.
To the extent that this section is inconsistent with the provisions of chapter one hundred and seventy-six M and any regulations promulgated thereunder, any nongroup health maintenance contract that is within the definition of a guaranteed issue health plan in said chapter one hundred and seventy-six M shall be governed by the provisions of said chapter one hundred and seventy-six M and any regulations promulgated thereunder.
Mass. Gen. Laws ch. 176G, § 16